Assume that random guesses are made for 7 ​multiple-choice questions on a test with 5 choices for each​ question, so that there are n=7 ​trials, each with probability of success​ (correct) given by p=0.20. Find the probability of no correct answers.

Q: Among fatal plane crashes that occurred during the past 55 years, 303 were due to pilot error, 78…

A: According to the given information, we have Total number of observations = 799

Q: Using the given confidence interval to find the margin of error, Confidence interval (5.88,…

A: Answer: From the given data, given the Confidence interval is (5.88, 9.86)

Q: What is the cumulative income of the median-income earner in this group?

A: The incomes are arranged in ascending order as shown below: $18,000, $20,000, $36,000, $43,000,…

Q: 6) In a company there are 10 executives: 6 women and 4 men. 4 are selected to attend a management…

A: 6- women 4-men 10- total members .4 are selected to attend management seminar. p(select 3 men and 1…

Q: Use this to predict the number of situps a person who watches 9.5 hours of TV can do (to one decimal…

A: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…

Q: Question 1 Scenario 1: The city of Pawnee wants to see how their high school seniors' SAT scores…

A: The most appropriate test statistic to use in scenario 1 would be the independent samples t-test.…

Q: 4) A lot of 1000 components contains 200 that are defective. Two components are drawn at random and…

A: The question is about probability Given : Total no. of components in a lot = 1000 No. of defective…

Q: Consider the given discrete probability distribution, X P(X): 0.2 2 0.3 Calculate the P(X>2) 3 0.1 4…

A: Answer: From the given data, X    :     1             2            3          4          5 P(X):…

Q: 18. Calculate the ±3 standard deviation range for the mean of 15.7 and S

A: Mean=15.7 Standard deviation=4.2

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1228 males surveyed,…

A: Male with tattoos Sample size, n1=1228 Had at least one tattoo, x1=176   Female with tattoos Sample…

Q: Two methods of memorizing difficult material are being tested to determine if one produces better…

A: The paired sample observations of scores are:

Q: A study was done using a treatment group and a placebo group. The results are shown in the table.…

A: According to the given information in this question We need to find conclusion and also find the 95%…

Q: 2. Based on the Employees' Salaries dataset below, and by using the Descriptive Statistic Tools in…

A: Statistics are broadly classified into two types. They are descriptive statistics and inference…

Q: A water footprint is a measure of the appropriation of fresh water. The per capita water footprint…

A: Here, mean is 1.64 Mgal and standard deviation is 2.78 Mgal.

Q: According to a​ survey, 55​% of young Americans aged 18 to 29 say the primary way they watch…

A: We can expect that 55% of the sample would watch television primarily through streaming services…

Q: Find the standard deviation, s, of sample data summarized in the frequency distribution table given…

A: Interval Frequency 20 - 26 3 27 - 33 18 34 - 40 42 41 - 47 17 48 - 54 7 55 - 61 1

Q: If X is a uniformly distributed random variable with a=3 and b=7,then Calculate the variance of…

A: Answer: From the given data, if X is a uniformly distributed random variable with, a = 3  and  b = 7…

Q: b) Run an ANOVA test using the statistical software package of your choice to compare solvability of…

A: Let us assume alpha=0.05 that is level of significance is 0.05 To run the ANOVA test let us use R…

Q: Find the range for the given data, 45,67,84,28,46,73,29,48,55,82

A: Answer: From the given data, 45,67,84,28,46,73,29,48,55,82 Sample size(n) = 10

Q: The Nile Superstore wants to test the claim less than 82% of their customers would buy the new…

A: Sample size n =150 Favorable cases x =122 Sample proportion p^=x/n =122/150 =0.8133

Q: If X represents the time in months and Y represents the profit in thousands for a business, A) What…

A: As PER POLICY I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAINING PARTS WITH NOTE I NEED THIS... X…

Q: the z score for the tallest man is z = ad to two decimal places.) and the z score for the shortest…

A: From the provided information, Mean (µ) = 173.15 cm Standard deviation (σ) = 7.57cm

Q: Two separate samples receive two different treatments. The first treatment group (N = 15) has a mean…

A: n1=15, x¯1=50, SS1=210n2=9, x¯2=56, SS2=190

Q: The confidence interval was (36,45) What was the margin of error? What was the point estimate

A: Answer: From the given data, The confidence interval = (36,45)

Q: (3. Find the missing value in each row of the table. Round answers to the same number of decimal…

A: According to the given information, we have The distribution is normal distribution.

Q: Assume a significance level of α = 0.05 and use the given information to complete parts (a) and (b)…

A: p value=0.2764,p=0.42, level of significance ɑ=0.05

Q: Does the hypnotism appear to be effective in reducing pain? Yes/No

A: We have to find 95% confidence interval for difference mean

Q: It has been hypothesized that that the threespine stickback fish is more likely to mate with a…

A: The 9 indices were as follows: -32.0, -29.8, -40.6, -90.8, -29.2, -28.8, -78.4, -59.2, -74.3

Q: The numbers of words defined on randomly selected pages from a dictionary are shown below. Find the…

A: We have given data are  39,40,48,38,75,45,68,47,67,70

Q: Assume that the two samples are independent simple random samples selected from normally distributed…

A: The data for the women's and men's diastolic blood pressure are given.

Q: 3. A shuttle operator has sold 20 tickets to ride the shuttle. All passengers (ticket holder) are…

A: a. To find the probability that a majority of ticket holders are part of the frequent rider club, we…

Q: Here are 6 celebrities with some of the highest net worths (in millions of dollars) in a recent…

A: According to the given information, we have Total number of given celebrities = 6

Q: The line of best fit for a data set is y = 1. 1x + 3.4. Find the residual for each of the coordinate…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: The director of student services at Oxnard College is interested in whether women are less likely to…

A: x1=368n1=368+265=633x2=482n2=482+264=746

Q: The manufacturing sector contributes 17% of Canada’s gross domestic product. A customer orders 50…

A: The probability shows how likely an event occurs.

Q: A local bakery has determined a probability distribution for the number of cheesecakes that they…

A: The given table is a probability distribution for the number of cheese cakes that they sell in a…

Q: A population consists of a batch of 24,683 aspirin tablets, and it includes 1,050 that are defective…

A: answer  given, for population: x =1050 n =24683 ______________________________ for sample: n=200…

Q: A sample of 45 individuals at a shopping mall found that the mean number of visits to a restaurant…

A: n=45,  sample mean X̄=2.69, s=1.65

Q: 1. Say there is a shuttle that has 4 seats (it can carry only 4 passengers at most). The shuttle…

A: There is a random variable X denoting the number of people with tickets that show up to ride the…

Q: Solve the problem. Find the critical value x corresponding to a sample size of 19 and a confidence…

A: Sample size n =19 99% confidence level

Q: Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate:…

A: Confidence level=95%=0.95 Alpha=1-0.95=0.05 Level of significance=0.05 And sample size n =56…

Q: According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a…

A: Mean(μ)=128 standard deviation(σ)=23

Q: Construct one table that includes relative frequencies based on the frequency distributions shown…

A: Here, we have given some data, then we have to calculate relative frequency for both type of data…

Q: Suppose it is known that in a certain community 30% of the households have a micro-wave oven. If we…

A: Givenp=0.30sample size(n)=19Let "x" no.of households will have micro-wave…

Q: Use the following distribution to complete parts (a) through (d) below. 2, 5, 8, 12, 13 € (Round to…

A: Consider the distribution of variable, Xi i=1,2,...n. The mean of the variable, X¯=X1+X2+...+Xnn.…

Q: The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8…

A: Sample size (n) = 8 Significance level (α) = 1-0.95 = 0.05

Q: Use the z-score formula to complete each table. 12. Find the missing value in each row of the table.…

A: to use z score formula to complete the table correctly.

Q: In a recent tennis​ tournament, women playing singles matches used challenges on 137 calls made by…

A: According to the given information in this question We need to construct 95% confidence interval and…

Q: a) What is the setup for your null and alternative hypothesis? b) What is the value of the test…

A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAINING PARTS WITH NOTE I NEED…

Q: ative cars among residence of two neighboring cities differ. In order to est, the researcher…

A: Sample sizes n1=185  , n2=195 Favorable cases x1=75 , x2=68